Difference between revisions of "Element"
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The opposite of this would be <math>\notin</math>, which means the element is not contained within the set. | The opposite of this would be <math>\notin</math>, which means the element is not contained within the set. | ||
− | === | + | === Sets Within Sets === |
Elements can also be sets. For example, <math>B = \{1,\,2,\,\{3,\,4\}\}</math>. The elements of <math>B</math> are <math>1</math>, <math>2</math>, and the set <math>\{3,\,4\}</math>. | Elements can also be sets. For example, <math>B = \{1,\,2,\,\{3,\,4\}\}</math>. The elements of <math>B</math> are <math>1</math>, <math>2</math>, and the set <math>\{3,\,4\}</math>. |
Revision as of 19:18, 6 March 2008
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An element, also called a member, is an object contained within a set or class.
means set contains the elements 1, 2, 3 and 4.
To show that an element is contained within a set, the symbol is used. If , then .
The opposite of this would be , which means the element is not contained within the set.
Sets Within Sets
Elements can also be sets. For example, . The elements of are , , and the set .